Webnov 24, 2021 · it's unlikley to be related to the old yeast infection but you have to keep an eye for few days as yeast can be recurrent and it may present initially like this in few cases. This doesn't sound like any sti too. Make sure you drink plenty of water and abstain. Webjan 11, 2023 · a vaginal yeast infection is a fungal infection that causes irritation, discharge and intense itchiness of the vagina and the vulva — the tissues at the vaginal opening.